212 



1) Cylindrospernmm majus. 



C aqiiaticiim, coiifcrvicola, saturate aerugineum; trichomatibus crassioribus (diam. 

 Vioo — V380'") flexuosis, moniliforniibus, aeniginosis; articulis sphaericis vel sphaeroi- 

 (leis, (leprcssis; spermaliis majoribus (long, '/ijo — Vso'"? '**• '/300 — Vieo'")? ffisper- 

 mio hjalino cinctis, maturitate fiiscis. 



Auf Coiiferven in halbsüssera und halbsalzigem Wasser auf Wangeroogel 



2) Cylindrospermiim confftobnfitm. 



C. aquaticuni, confervicola , conglobatum; trichomatibus tenuissimis (diam. Vtm") 

 acqualibiis, moniliforniibus, parum flexuosis, plus minusve parallelis; articulis ellipticis; 

 Sperma fiis majoribus, fuscis (long. y,oo — Vso^'S lat. Vsoo — Vi5o'")t oblongis, globulo 

 elliptico, majori ornatis. 



Auf Oedogonium vesicatum und Cladophora fracta. 



3) CyJindrospermum polyspermum. 



C limicola^ viridi-acrugiueum, membrauaceum, subcompactum ; trichomatibus te- 

 nuissimis (diam. Ygoo — /«o'")? moniliforniibus, intricatis, inacquaübus, distincte articu- 

 latis; articulis sphaericis ellipticisAC, liinc indc geminatis; spermatiis majoribus, nu- 

 merosissimis, totum Stratum obtcgentibus (long. Viqq — Vso"')' 

 Schlesien: C. Sprengel I (als Nostoc confusum). 



4) Cylindrospcrmum spirale, 



C. terrcstre, riparium, aeruginosum, explanatum; trichomatibus attenuatis, inac- 

 quaübus, subtilissiniis (diam. Y^og — Vsoo'")? submonililbrmibus, tenuioribus spiralibus; 

 articulis ellipticis, in tenuioribus elongatis, cjlindricis; spermatiis majoribus (long. 

 Vi5o — Vioo'")^ elongato-cllipticis, globulo elliptico ornatis. 



Oscillatoria decorücans Kg. Dec. XVI. 

 Am Muldeufer bei Eilenburg 1 Mai 1834. 



5) Cylindrospcrmum riparium. 



C riparium, aeruginosum, explanatum, subcompactum; /ric/jom<//?'Äj*s subacqualibus 

 (diam. '/äjo — V500'") parum flexuosis et implicatis, hinc inde parallelis, moniliforniibus, 

 distinctissime articulatis; articulis ellipticis; spermatiis (long. Vir^ — Vioo"0 eylindra- 

 ceo-ellipticis, globulo minutissimo elliptico ornatis. 

 Aiu Muldeufer hei Eileiiburg ! Mai 1834. 

 G) Cylindrospermum limicola. 

 C. saturate viride, nitens, explanatum, tuberculatum, subcompactum; trichomatibus 

 (diam. y4;o"') moniliforniibus, aequalibus, subparallclis, rectiusculis vel flexuosis; articulis 

 distinctissimis, diametro aequalibus; spermatiis terminalibus (long. Vijo — Vi-o'").» ^rti- 

 culo elliptico coronatis. 



An feuchten Ufern kleiner Bäche und Gräben bei Nordhausen. Juli 1839. 



7) Cylindrospcrmum humicola. 

 C niüdum, aerugineum, tenue expansum; trichomatibus (diam. '/,8o'") monilifor- 

 mibus, aequalibus, curvato-flexuosis, irrcgularitor intricatis, distinctissime articulatis; ar- 



